Spiral Diffuser Reeds. Natural white Ratan reeds. Set of 6. Great for use with fragrance oil diffusers. Often bought with our 8 oz fragrance oil diffuser refill bottles. How to Use Reeds: The natural rattan reeds are made to absorb additional fragrance and release into your space. For less scent or to make your diffuser last longer, remove some reeds or flowers. The more reeds use you, the stronger the scent but the quicker your product will be consumed. When all reeds & flowers are used, product will last about 4-5 weeks. With reduction of reeds, product can last up to 3 months.